I'm interessting in some design guides. I would deploy data in 2.4 GHz band and the voice in 5 GHz band. But aren't there problems with the 802.11n deployment, I thought that this works better in 5 GHz.
What recommendations would you make and did you have some issues with this design?
Thanks in advance.
You can find all kinds of documentation on Cisco's 802.11n homepage: http://www.cisco.com/en/US/netsol/ns767/networking_solutions_package.html
To answer your questions, there is no "problem" with running 802.11n in the 2.4GHz space, but there are limitations. You cannot use channel-bonding, which is the primary source of the added bandwidth that 802.11n offers. If you want to see 150Mbps data rates, you'll need to deploy it in a 5GHz implementation.
Another advantage to running in 5GHz is that you can isolate your 802.11n traffic from your 802.11b/g traffic on the 2.4GHz radio. This will prevent slowdown that can occur when legacy clients coexist with 802.11n clients.
So yes, you're correct to say that it does work better in 5GHz. The nice thing is that most 802.11n chips in laptops support this band.
That said, it would be best if voice and data can both exist in the 5GHz space. You can accomplish this by creating different SSIDs for your voice and data networks. There is nothing wrong with deploying both in 5GHz.
Let me know if you have anymore questions. Thanks!